| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20061207232213.GA29340@sgi.com>
Date: Thu, 7 Dec 2006 17:22:13 -0600
From: Erik Jacobson <erikj@....com>
To: linux-kernel@...r.kernel.org
Cc: guillaume.thouvenin@...l.net, matthltc@...ibm.com
Subject: [PATCH] connector: Some fixes for ia64 unaligned access errors
On ia64, the various functions that make up cn_proc.c cause kernel
unaligned access errors.
If you are using these, for example, to get notification about
all tasks forking and exiting, you get multiple unaligned access errors
per process.
Here, we just adjust how the variables are declared and use memcopy to
avoid the error messages.
Signed-off-by: Erik Jacobson <erikj@....com>
---
cn_proc.c | 94 +++++++++++++++++++++++++++++++-------------------------------
1 file changed, 47 insertions(+), 47 deletions(-)
--- linux.orig/drivers/connector/cn_proc.c 2006-11-29 15:57:37.000000000 -0600
+++ linux/drivers/connector/cn_proc.c 2006-12-07 16:50:03.195035791 -0600
@@ -49,7 +49,7 @@
void proc_fork_connector(struct task_struct *task)
{
struct cn_msg *msg;
- struct proc_event *ev;
+ struct proc_event ev;
__u8 buffer[CN_PROC_MSG_SIZE];
struct timespec ts;
@@ -57,19 +57,19 @@
return;
msg = (struct cn_msg*)buffer;
- ev = (struct proc_event*)msg->data;
- get_seq(&msg->seq, &ev->cpu);
+ get_seq(&msg->seq, &ev.cpu);
ktime_get_ts(&ts); /* get high res monotonic timestamp */
- ev->timestamp_ns = timespec_to_ns(&ts);
- ev->what = PROC_EVENT_FORK;
- ev->event_data.fork.parent_pid = task->real_parent->pid;
- ev->event_data.fork.parent_tgid = task->real_parent->tgid;
- ev->event_data.fork.child_pid = task->pid;
- ev->event_data.fork.child_tgid = task->tgid;
+ ev.timestamp_ns = timespec_to_ns(&ts);
+ ev.what = PROC_EVENT_FORK;
+ ev.event_data.fork.parent_pid = task->real_parent->pid;
+ ev.event_data.fork.parent_tgid = task->real_parent->tgid;
+ ev.event_data.fork.child_pid = task->pid;
+ ev.event_data.fork.child_tgid = task->tgid;
memcpy(&msg->id, &cn_proc_event_id, sizeof(msg->id));
msg->ack = 0; /* not used */
- msg->len = sizeof(*ev);
+ msg->len = sizeof(ev);
+ memcpy(msg->data, &ev, sizeof(ev));
/* If cn_netlink_send() failed, the data is not sent */
cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL);
}
@@ -77,7 +77,7 @@
void proc_exec_connector(struct task_struct *task)
{
struct cn_msg *msg;
- struct proc_event *ev;
+ struct proc_event ev;
struct timespec ts;
__u8 buffer[CN_PROC_MSG_SIZE];
@@ -85,24 +85,24 @@
return;
msg = (struct cn_msg*)buffer;
- ev = (struct proc_event*)msg->data;
- get_seq(&msg->seq, &ev->cpu);
+ get_seq(&msg->seq, &ev.cpu);
ktime_get_ts(&ts); /* get high res monotonic timestamp */
- ev->timestamp_ns = timespec_to_ns(&ts);
- ev->what = PROC_EVENT_EXEC;
- ev->event_data.exec.process_pid = task->pid;
- ev->event_data.exec.process_tgid = task->tgid;
+ ev.timestamp_ns = timespec_to_ns(&ts);
+ ev.what = PROC_EVENT_EXEC;
+ ev.event_data.exec.process_pid = task->pid;
+ ev.event_data.exec.process_tgid = task->tgid;
memcpy(&msg->id, &cn_proc_event_id, sizeof(msg->id));
msg->ack = 0; /* not used */
- msg->len = sizeof(*ev);
+ msg->len = sizeof(ev);
+ memcpy(msg->data, &ev, sizeof(ev));
cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL);
}
void proc_id_connector(struct task_struct *task, int which_id)
{
struct cn_msg *msg;
- struct proc_event *ev;
+ struct proc_event ev;
__u8 buffer[CN_PROC_MSG_SIZE];
struct timespec ts;
@@ -110,32 +110,32 @@
return;
msg = (struct cn_msg*)buffer;
- ev = (struct proc_event*)msg->data;
- ev->what = which_id;
- ev->event_data.id.process_pid = task->pid;
- ev->event_data.id.process_tgid = task->tgid;
+ ev.what = which_id;
+ ev.event_data.id.process_pid = task->pid;
+ ev.event_data.id.process_tgid = task->tgid;
if (which_id == PROC_EVENT_UID) {
- ev->event_data.id.r.ruid = task->uid;
- ev->event_data.id.e.euid = task->euid;
+ ev.event_data.id.r.ruid = task->uid;
+ ev.event_data.id.e.euid = task->euid;
} else if (which_id == PROC_EVENT_GID) {
- ev->event_data.id.r.rgid = task->gid;
- ev->event_data.id.e.egid = task->egid;
+ ev.event_data.id.r.rgid = task->gid;
+ ev.event_data.id.e.egid = task->egid;
} else
return;
- get_seq(&msg->seq, &ev->cpu);
+ get_seq(&msg->seq, &ev.cpu);
ktime_get_ts(&ts); /* get high res monotonic timestamp */
- ev->timestamp_ns = timespec_to_ns(&ts);
+ ev.timestamp_ns = timespec_to_ns(&ts);
memcpy(&msg->id, &cn_proc_event_id, sizeof(msg->id));
msg->ack = 0; /* not used */
- msg->len = sizeof(*ev);
+ msg->len = sizeof(ev);
+ memcpy(msg->data, &ev, sizeof(ev));
cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL);
}
void proc_exit_connector(struct task_struct *task)
{
struct cn_msg *msg;
- struct proc_event *ev;
+ struct proc_event ev;
__u8 buffer[CN_PROC_MSG_SIZE];
struct timespec ts;
@@ -143,19 +143,19 @@
return;
msg = (struct cn_msg*)buffer;
- ev = (struct proc_event*)msg->data;
- get_seq(&msg->seq, &ev->cpu);
+ get_seq(&msg->seq, &ev.cpu);
ktime_get_ts(&ts); /* get high res monotonic timestamp */
- ev->timestamp_ns = timespec_to_ns(&ts);
- ev->what = PROC_EVENT_EXIT;
- ev->event_data.exit.process_pid = task->pid;
- ev->event_data.exit.process_tgid = task->tgid;
- ev->event_data.exit.exit_code = task->exit_code;
- ev->event_data.exit.exit_signal = task->exit_signal;
+ ev.timestamp_ns = timespec_to_ns(&ts);
+ ev.what = PROC_EVENT_EXIT;
+ ev.event_data.exit.process_pid = task->pid;
+ ev.event_data.exit.process_tgid = task->tgid;
+ ev.event_data.exit.exit_code = task->exit_code;
+ ev.event_data.exit.exit_signal = task->exit_signal;
memcpy(&msg->id, &cn_proc_event_id, sizeof(msg->id));
msg->ack = 0; /* not used */
- msg->len = sizeof(*ev);
+ msg->len = sizeof(ev);
+ memcpy(msg->data, &ev, sizeof(ev));
cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL);
}
@@ -170,7 +170,7 @@
static void cn_proc_ack(int err, int rcvd_seq, int rcvd_ack)
{
struct cn_msg *msg;
- struct proc_event *ev;
+ struct proc_event ev;
__u8 buffer[CN_PROC_MSG_SIZE];
struct timespec ts;
@@ -178,16 +178,16 @@
return;
msg = (struct cn_msg*)buffer;
- ev = (struct proc_event*)msg->data;
msg->seq = rcvd_seq;
ktime_get_ts(&ts); /* get high res monotonic timestamp */
- ev->timestamp_ns = timespec_to_ns(&ts);
- ev->cpu = -1;
- ev->what = PROC_EVENT_NONE;
- ev->event_data.ack.err = err;
+ ev.timestamp_ns = timespec_to_ns(&ts);
+ ev.cpu = -1;
+ ev.what = PROC_EVENT_NONE;
+ ev.event_data.ack.err = err;
memcpy(&msg->id, &cn_proc_event_id, sizeof(msg->id));
msg->ack = rcvd_ack + 1;
- msg->len = sizeof(*ev);
+ msg->len = sizeof(ev);
+ memcpy(msg->data, &ev, sizeof(ev));
cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL);
}
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists